https://www.gardenology.org/w/index.php?action=history&feed=atom&title=Dryas_%28plant%29 2026-04-10T14:31:56Z Revision history for this page on the wiki MediaWiki 1.43.0 https://www.gardenology.org/w/index.php?title=Dryas_(plant)&diff=3433&oldid=prev 2007-05-04T04:30:03Z

<p></p> <p><b>New page</b></p><div>{{Taxobox<br /> | color = lightgreen<br /> | name = &#039;&#039;Dryas&#039;&#039;<br /> | image = Dryas drummondii6.jpg<br /> | image_width = 240px<br /> | image_caption = &#039;&#039;Dryas × suendermannii&#039;&#039;<br /> | regnum = [[Plant]]ae<br /> | divisio = [[Magnoliophyta]]<br /> | classis = [[Magnoliopsida]]<br /> | ordo = [[Rosales]]<br /> | familia = [[Rosaceae]]<br /> | genus = &#039;&#039;&#039;&#039;&#039;Dryas&#039;&#039;&#039;&#039;&#039;<br /> | genus_authority = [[Carolus Linnaeus|L.]]<br /> | subdivision_ranks = Speciea<br /> | subdivision = See text<br /> }}<br /> <br /> &#039;&#039;&#039;&#039;&#039;Dryas&#039;&#039;&#039;&#039;&#039; is a genus of dwarf [[perennial]] [[herbaceous]] [[plant]]s in the [[rose]] family [[Rosaceae]], native to the [[arctic-alpine|arctic and alpine]] regions of [[Europe]], [[Asia]] and [[North America]]. The genus is named after the Greek nymph [[Dryas]].<br /> <br /> There are three [[species]] and one [[hybrid]]:<br /> *&#039;&#039;[[Dryas drummondii]]&#039;&#039; – Drummond&#039;s Avens<br /> *&#039;&#039;[[Dryas integrifolia]]&#039;&#039; – Entire-leaved Avens<br /> *&#039;&#039;[[Dryas octopetala]]&#039;&#039; – Mountain Avens<br /> *&#039;&#039;Dryas × suendermannii&#039;&#039; – &#039;&#039;D. drummondii&#039;&#039; × &#039;&#039;D. octopetala&#039;&#039;<br /> <br /> The species are superficially similar to &#039;&#039;[[Geum]]&#039;&#039;, &#039;&#039;[[Potentilla]]&#039;&#039; and [[strawberry|&#039;&#039;Fragaria&#039;&#039;]], but are distinct in having [[flower]]s with &#039;&#039;eight&#039;&#039; petals (rarely seven or up to ten), instead of the five petals found in most other genera in the Rosaceae. The flowers are erect and white with a yellow centre (&#039;&#039;[[Dryas integrifolia]]&#039;&#039;, &#039;&#039;[[Dryas octopetala]]&#039;&#039;) or pendulous and all-yellow (&#039;&#039;[[Dryas drummondii]]&#039;&#039;), and held conspicuously above the small plants. The hybrid has pale yellow flowers. This makes them very popular in [[Rock garden|rockeries]] and [[alpine garden]]s.<br /> <br /> The classification of &#039;&#039;Dryas&#039;&#039; within the Rosaceae is presently unclear. The genus was originally placed in the subfamily [[Rosoideae]], and later in subfamily [[Dryadeae]] along with the genera &#039;&#039;[[Chamaebatia]]&#039;&#039;, &#039;&#039;[[Purshia]]&#039;&#039; and &#039;&#039;[[Cercocarpus]]&#039;&#039;, all four genera sharing [[root nodule]]s that host the [[nitrogen fixation|nitrogen-fixing]] [[bacterium]] &#039;&#039;[[Frankia]]&#039;&#039;. However, recent genetic research indicates that Dryadeae may be paraphyletic, with &#039;&#039;Dryas&#039;&#039; not closely related to the other three genera.<br /> <br /> ==References==<br /> *[http://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?4000 Germplasm Resources Information Network: &#039;&#039;Dryas&#039;&#039;]<br /> *Huxley, A. (1992). &#039;&#039;New RHS Dictionary of Gardening&#039;&#039;. Macmillan [&#039;&#039;D. × suendermannii&#039;&#039;].<br /> <br /> [[Category:Rosaceae]]<br /> {{Rosales-stub}}</div>

MediaWiki default